Hexagon nut cold heading die

Abstract

The utility model discloses a hexagon nut cold heading die which comprises a cold heading base, a plurality of cold heading stations are arranged on the cold heading base, die holders are arranged on the cold heading stations, punching rods are arranged on the front side and the rear side of each die holder, die core holes and fixing holes are formed in the die holders, the die core holes face the punching rods, and die cores are arranged in the die core holes. A fixing seat is arranged in the fixing hole, the plurality of die cores comprise a plurality of first die cores and second die cores, first die grooves are formed in the first die cores, second die grooves are formed in the second die cores, through holes corresponding to the punching rods are formed in the fixing seat, first tooth forming surfaces are arranged at the bottoms of the second die grooves, and tooth surface punching rods are arranged on the punching rods corresponding to the second die cores; the end face, facing the second die cavity, of the tooth face punching rod is provided with a second tooth forming face, the first tooth forming face and the second tooth forming face are each provided with a plurality of protruding punching teeth, anti-skid tooth faces on the two end faces of the nut can be punched at the same time, the production efficiency is improved, the anti-skid teeth can be prevented from deforming, and the nut quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the cold heading die technical field, more specifically relates to a hexagon nut cold heading die. BACKGROUND

[0002] As Figure 5 The hexagon nut part shown in the figure, the thickness is smaller, and the two end faces of the hexagon nut are anti-skid tooth surfaces, a plurality of anti-skid teeth are distributed in the circumferential direction on the anti-skid tooth surface, and the anti-skid teeth extend from the hole edge to the chamfer surface of the nut edge, and the adjacent anti-skid teeth are grooves, and the grooves are formed by stamping.

[0003] When the traditional cold heading is carried out on the above-mentioned hexagon nut, the same anti-skid tooth die is used, one side of the anti-skid tooth is first stamped out, and then the nut is turned to the other side, and the other side is stamped with anti-skid teeth, which not only has low efficiency, but also deforms the anti-skid teeth that have been stamped out during the second stamping, reducing the quality of the nut. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a hexagon nut cold heading die which can stamp the anti-skid tooth surfaces on the two end faces of the nut at the same time, improve the production efficiency of the nut, prevent the anti-skid teeth from deforming, and improve the quality of the nut.

[0005] To achieve the above object, the utility model provides the following technical scheme: a hexagon nut cold heading die, comprising a cold heading base, a plurality of cold heading stations are sequentially arranged on the cold heading base, a die holder is arranged on the cold heading station, anti-striking rods are arranged on the front and back sides of the die holder, a die core hole and a fixing hole are arranged on the die holder, and the die core hole faces the anti-striking rod, a die core is arranged in the die core hole, a fixing seat is arranged in the fixing hole, a plurality of die cores comprise a plurality of first die cores and second die cores, a first die groove is arranged on the first die core, a second die groove is arranged on the second die core, a through hole corresponding to the anti-striking rod is arranged on the fixing seat, a first tooth forming surface is arranged on the groove bottom of the second die groove, a tooth surface striking rod is arranged on the anti-striking rod corresponding to the second die core, a second tooth forming surface is arranged on the end surface of the tooth surface striking rod facing the second die groove, and a plurality of protruding stamping teeth are arranged on the first tooth forming surface and the second tooth forming surface.

[0006] Further, the stamping teeth on the first tooth forming surface and the second tooth forming surface are staggered in the circumferential direction.

[0007] Further, the first die core comprises a hexagonal forming die core and a first supporting block, the first die groove is located on the hexagonal forming die core, the first supporting block is located between the hexagonal forming die core and the fixing seat, a supporting hole is arranged on the first supporting block, and the supporting hole and the fixing hole are in communication with each other.

[0008] Further, the thickness of the plurality of hexagonal forming cores gradually decreases, and the planar size of the first die groove gradually increases.

[0009] Further, the support hole is provided with a chamfered forming groove near one end of the first die groove.

[0010] Further, the second die core comprises a hexagonal positioning die core and a second support block, and the first tooth forming surface is located on the end surface of the second support block.

[0011] Further, the die core hole is a conical hole, and the die core is in interference fit with the die core hole.

[0012] Compared with the prior art, the beneficial effects of the hexagonal nut cold upsetting die are as follows: a blank is sequentially placed into the first die core in different die seats for stamping, and gradually forms a hexagonal nut blank, then the hexagonal nut blank is placed into the second die core, one end surface of the nut contacts the first tooth forming surface, then the tooth surface punch rod is pressed on the other end surface of the nut, and the anti-skid tooth surface on the two end surfaces of the nut is extruded at the same time, the stamping of the nut is completed, the production efficiency of the nut is improved, the anti-skid tooth deformation is prevented, and the quality of the nut is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the die seat with the first die core in the hexagonal nut cold upsetting die of the utility model;

[0014] Figure 2 It is a structure schematic view of the first die core in the hexagonal nut cold upsetting die of the utility model;

[0015] Figure 3 It is a structure schematic view of the die seat with the second die core in the hexagonal nut cold upsetting die of the utility model;

[0016] Figure 4 It is a structure schematic view of the tooth surface punch rod corresponding to the second die core in the hexagonal nut cold upsetting die of the utility model;

[0017] Figure 5 It is a structure schematic view of the part.

[0018] The drawing label: die seat 1;Die core hole 2;Fixing hole 3;Fixed seat 4;First die core 5;Second die core 6;First die groove 7;Second die groove 8;Through hole 9;First tooth forming surface 10;Tooth surface punch rod 11;Second tooth forming surface 12;Stamping tooth 13;Hexagonal forming core 14;First support block 15;Support hole 16;Chamfered forming groove 17;Hexagonal positioning die core 18;Second support block 19. DETAILED DESCRIPTION

[0019] In the description of the utility model, it is necessary to explain that, for the direction words, if the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the utility model.

[0020] In addition, if the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the "first", "second" features can be explicitly or implicitly included one or more features, and in the description of the utility model, the meaning of "several", "several" is two or more than two, unless otherwise explicitly specified.

[0021] Reference Figures 1 to 5 Further illustrate the utility model.

[0022] A hexagon nut cold heading die, including cold heading base (the drawing is not shown), a plurality of cold heading stations are sequentially arranged on the cold heading base, the die holder 1 is arranged on the cold heading station, the die holder 1 is provided with punch bar (the drawing is not shown) on the front and rear sides, the die core hole 2 and the fixed hole 3 are arranged on the die holder 1, and the die core hole 2 faces the punch bar, the die core is arranged in the die core hole 2, the fixed seat 4 is arranged in the fixed hole 3, a plurality of die cores include a plurality of first die core 5 and second die core 6, the first die core 5 is provided with the first die groove 7, the second die core 6 is provided with the second die groove 8, the fixed seat 4 is provided with the through hole 9 corresponding to the punch bar, the first tooth forming surface 10 is arranged on the groove bottom of the second die groove 8, the tooth surface punch rod 11 is arranged on the punch bar corresponding to the second die core 6, the second tooth forming surface 12 is arranged on the end face of the tooth surface punch rod 11 towards the second die groove 8, a plurality of protruding stamping teeth 13 are arranged on the first tooth forming surface 10 and the second tooth forming surface 12.

[0023] In the preferred embodiment, the stamping teeth 13 on the first tooth forming surface 10 and the second tooth forming surface 12 are staggered in the circumferential direction.

[0024] As Figure 1 And Figure 2As shown in the drawings, preferably in the embodiment, the first mold core 5 comprises a hexagonal forming mold core 14 and a first supporting block 15, the first mold groove 7 is located on the hexagonal forming mold core 14, the first supporting block 15 is located between the hexagonal forming mold core 14 and the fixed seat 4, and the first supporting block 15 is provided with a supporting hole 16, which is in communication with the fixed hole 3.

[0025] Preferably in the embodiment, the thickness of the hexagonal forming mold core 14 gradually decreases, and the planar size of the first mold groove 7 gradually increases.

[0026] As shown in the drawings, Figure 2 Preferably in the embodiment, the supporting hole 16 is provided with a chamfered forming groove 17 close to one end of the first mold groove 7.

[0027] As shown in the drawings, Figure 3 Preferably in the embodiment, the second mold core 6 comprises a hexagonal positioning mold core 18 and a second supporting block 19, and the first tooth forming surface 10 is located on the end surface of the second supporting block 19.

[0028] Preferably in the embodiment, the mold core hole 2 is a conical hole, and the mold core is in interference fit with the mold core hole 2.

[0029] As shown in the drawings, Figures 1 to 4 As shown in the drawings, a cylindrical blank is placed into the first mold groove 7 of the first mold core 5, and then extruded by the punch rods at both ends, so that the cylindrical blank is extruded into a hexagonal cylindrical blank. After passing through multiple first mold cores 5 in turn, the thickness (axial length) of the hexagonal blank gradually decreases, and the radial size gradually increases. Until in the last first mold core 5, the thickness of the blank nut is slightly larger than that of the finished nut, and the radial size is slightly smaller than that of the finished nut. Then the blank is transferred to the second mold groove 8 of the second mold core 6, one end surface of the blank nut contacts the first tooth forming surface 10 on the second supporting block 19, and then the punch rod drives the tooth surface punch rod 11 to press on the other end surface of the blank nut. The punch rod extrudes the anti-skid tooth surface on the two end surfaces of the blank nut, and at the same time, the blank hole is punched out by the punch rod, completing the punching forming of the nut.

[0030] Since the anti-skid tooth surfaces on the two end surfaces of the nut are punched in the same second mold core 6, the production efficiency of the nut is improved, and the anti-skid tooth deformation is prevented, thereby improving the quality of the nut.

[0031] Specifically, when the blank is transferred from one first mold core 5 to another first mold core 5, the blank is reversed by the transfer clamps, so that the blank is uniformly deformed.

[0032] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above examples, and belongs to the technical scheme under the idea of the present application all belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A hexagon nut cold heading die, comprising a cold heading base, a plurality of cold heading stations are sequentially arranged on the cold heading base, a die holder is arranged on the cold heading station, and a punch rod is arranged on the front and rear sides of the die holder, characterized in that: The mold base is provided with a mold core hole and a fixing hole, the mold core hole faces the punch rod, the mold core hole is provided with a mold core, the fixing hole is provided with a fixing seat, a plurality of mold cores include a plurality of first mold cores and second mold cores, the first mold core is provided with a first mold groove, the second mold core is provided with a second mold groove, the fixing seat is provided with a through hole corresponding to the punch rod, the bottom of the second mold groove is provided with a first tooth forming surface, the punch rod corresponding to the second mold core is provided with a tooth surface punch rod, the end surface of the tooth surface punch rod facing the second mold groove is provided with a second tooth forming surface, and a plurality of protruding stamping teeth are arranged on the first tooth forming surface and the second tooth forming surface.

2. Hexagon nut cold heading die according to claim 1, characterized in that The stamping teeth on the first tooth forming surface and the second tooth forming surface are staggered in the circumferential direction.

3. The hexagon nut cold heading die according to claim 1, characterized in that: The first mold core includes a hexagonal forming mold core and a first supporting block, the first mold groove is located on the hexagonal forming mold core, and the first supporting block is located between the hexagonal forming mold core and the fixing seat.

4. The hexagon nut cold heading die according to claim 3, characterized in that: The thickness of the plurality of hexagonal forming mold cores gradually decreases, and the planar size of the first mold groove gradually increases.

5. The hexagon nut cold heading die according to claim 3, characterized in that: An end of the supporting hole close to the first mold groove is provided with a chamfer forming groove.

6. The hexagon nut cold heading die according to claim 1, characterized in that: The second mold core includes a hexagonal positioning mold core and a second supporting block, and the first tooth forming surface is located on the end surface of the second supporting block.

7. The hexagon nut cold heading die according to claim 1, characterized in that: The mold core hole is a conical hole, and the mold core is in interference fit with the mold core hole.

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